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| author | Peter Maydell <peter.maydell@linaro.org> | 2019-05-16 15:47:30 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-06-17 15:11:18 +0100 |
| commit | e70af24b42190481e19c9adb727b97a0fc794ea8 (patch) | |
| tree | f35ba34febd81b3172bf6e54f7c28e4207c90fab | |
| parent | 5d0e5694470d2952b4f257bc985cac8c89b4fd92 (diff) | |
| download | qemu-e70af24b42190481e19c9adb727b97a0fc794ea8.zip qemu-e70af24b42190481e19c9adb727b97a0fc794ea8.tar.gz qemu-e70af24b42190481e19c9adb727b97a0fc794ea8.tar.bz2 | |
hw/arm/boot: Don't assume RAM starts at address zero
In the Arm kernel/initrd loading code, in some places we make the
incorrect assumption that info->ram_size can be treated as the
address of the end of RAM, as for instance when we calculate the
available space for the initrd using "info->ram_size - info->initrd_start".
This is wrong, because many Arm boards (including "virt") specify
a non-zero info->loader_start to indicate that their RAM area
starts at a non-zero physical address.
Correct the places which make this incorrect assumption.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Message-id: 20190516144733.32399-2-peter.maydell@linaro.org
| -rw-r--r-- | hw/arm/boot.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/hw/arm/boot.c b/hw/arm/boot.c index 0261fda..bb37a93 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -977,6 +977,7 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu, int elf_machine; hwaddr entry; static const ARMInsnFixup *primary_loader; + uint64_t ram_end = info->loader_start + info->ram_size; if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) { primary_loader = bootloader_aarch64; @@ -1048,8 +1049,7 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu, /* 32-bit ARM */ entry = info->loader_start + KERNEL_LOAD_ADDR; kernel_size = load_image_targphys_as(info->kernel_filename, entry, - info->ram_size - KERNEL_LOAD_ADDR, - as); + ram_end - KERNEL_LOAD_ADDR, as); is_linux = 1; } if (kernel_size < 0) { @@ -1063,12 +1063,11 @@ static void arm_setup_direct_kernel_boot(ARMCPU *cpu, if (info->initrd_filename) { initrd_size = load_ramdisk_as(info->initrd_filename, info->initrd_start, - info->ram_size - info->initrd_start, - as); + ram_end - info->initrd_start, as); if (initrd_size < 0) { initrd_size = load_image_targphys_as(info->initrd_filename, info->initrd_start, - info->ram_size - + ram_end - info->initrd_start, as); } |